Improved knuckle-joint



UNITE STATES PATENT rrlcn.

J. K. COLLINS, OF HUNTSVILLE, ALABAMA.

IIVIOPROVED KNUCKLE-JOINT.

Specification forming part of Letters Patent No. 52,969, dated March 6,1866.

To all 'whom it may concern.-

Beit known that I, J. K. COLLINS, of Huntsville, in the county ofMadison and State of Alabama, have invented a new and useful Improvementin Knuckle-Joints; and I do hereby declare Ithat the following is afull, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same, reference being had to theaccompanying drawings, forming part of this speciiication.

The present invention has for its principal object the relief of thecenter-pin of a knucklejoint from strain upon it produced by the workingof the joint; and it consists in a novel construction ot' the jointwhereby the centerpin is entirely relieved from strain, it merelyserving as a means for holding` the parts constituting the jointtogether and besides the joint is rendered firm and'strong and itsresistive force to strains or breakage from use greatly' increased.

In :.lccompauying plate of drawings my iinprovement is illustrated,Figure l being a view ofthe joint when all its parts are securedtogether; Fig. 2, a view of the joint with one of its cap or coveringplates removed; Fig. 3, a section taken in the plane of the line a; x,Fig. 2.

a a in the drawings represent a valve-stein, in connection with which myimproved kn ucklejoint b will be explained. The contiguous ends of thevalve-stem a and connecting-rod c, which are knuckle-jointed together,are each made with inclined faces d d from the center outward, whichinclination is to correspond to the length of play which the parts areto y have in their joint to accomplish the purpose to which they are tobe applied.

Upon opposite sides of both the valve-stem a and rod c are similararc-shaped square grooves ff, in which grooves, upon the same side ofthe valve-stem and rod, and extending across their joint or from one tothe other, is

the ring upon such side of the two parts ofv thejoint, this bolt beingsecured in position by means of a screw-nut, p, upon its other end,between which. and the surface ot' the stem and rod is a washer-plate,q, corresponding in size and shape to the head-plate o of' the bolt, andalso covering the ring upon such side, as before explained, for the saidheadplate 0.

From the above description it is obvious that as the joint is worked, inlieu ofthe two parts jointed together turning upon the center bolt orpin, m, as has heretofore been the case, the disadvantage of which hasbeen hereinbefore alluded to, they turn upon the connecting-rings l1. hthereof, the bolt in my improvement simply serving as a means lo holdthe, parts together, constituting the joint, whereby great strength andfirmness is imparted to the joint, and consequentlyany breakage orstrain thereof from use is in a great degree obviated,`

thus increasing the length of time to which thejoint may be worked.

I claim as new and desire to secure by Letters Patent- Connecting thetwo parts of a knuckle-joint together by means of one or more rings, hh, applied thereto, substantially in the manner and for the purposespecified.

J. K. COLLINS.

Witnesses:

J AMES McINTosH, J oHN H. MOORE.

